Newly formed neutron stars have weak magnetic fields which strengthen over time, due to the conservation of angular momentum
Indicate whether the statement is true or false
FALSE
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The pregalactic blobs had masses similar to
A) dwarf galaxies. B) the Sun. C) the Earth. D) the Milky Way. E) open clusters of stars.
Resistances connected in parallel all have
A. the same current.
B. the same potential difference.
C. different voltages.
D. the same charge.
A 4.0-kg mass on the end of a string rotates in a circular motion on a horizontal frictionless table. The mass has a constant speed of 2.0 m/s and the radius of the circle is 0.80 m. What is the magnitude of the resultant force acting on the mass?
a. 39 N b. 20 N c. 44 N d. 0 N e. 30 N
What do we mean when we say that two light rays striking a screen are in phase with each other?
A) When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes. B) They are traveling at the same speed. C) They have the same wavelength. D) They alternately reinforce and cancel each other.